中国物理B ›› 2012, Vol. 21 ›› Issue (8): 87401-087401.doi: 10.1088/1674-1056/21/8/087401

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Interstitial vortex in superconducting film with periodic hole arrays

何世坤, 张伟君, 温振超, 肖宏, 韩秀峰, 顾长志, 邱祥冈   

  1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2012-03-04 修回日期:2012-04-14 出版日期:2012-07-01 发布日期:2012-07-01
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant Nos. 2009CB929100 and 2011CBA00107) and the National Natural Science Foundation of China (Grant Nos. 91121004, 10974241, and 11104335).

Interstitial vortex in superconducting film with periodic hole arrays

He Shi-Kun (何世坤), Zhang Wei-Jun (张伟君), Wen Zhen-Chao (温振超), Xiao Hong (肖宏), Han Xiu-Feng (韩秀峰), Gu Chang-Zhi (顾长志), Qiu Xiang-Gang (邱祥冈 )   

  1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2012-03-04 Revised:2012-04-14 Online:2012-07-01 Published:2012-07-01
  • Contact: Qiu Xiang-Gang E-mail:xgqiu@iphy.ac.cn
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant Nos. 2009CB929100 and 2011CBA00107) and the National Natural Science Foundation of China (Grant Nos. 91121004, 10974241, and 11104335).

摘要: The response of superconducting Nb films with diluted triangular and square array of holes to perpendicular magnetic field are investigated. Due to small edge-to-edge separation of the holes, the patterned films are similar to multi-connected superconducting islands. Two regions in magnetoresistance R(H) curves can be identified according to the field intervals of the resistance minima. Moreover, in between these two regions, variation of the minima spacing was observed. Our results provide strong evidence of the coexistence of interstitial vortices in the islands and fluxoids in the holes.

关键词: matching effect, interstitial vortex

Abstract: The response of superconducting Nb films with diluted triangular and square array of holes to perpendicular magnetic field are investigated. Due to small edge-to-edge separation of the holes, the patterned films are similar to multi-connected superconducting islands. Two regions in magnetoresistance R(H) curves can be identified according to the field intervals of the resistance minima. Moreover, in between these two regions, variation of the minima spacing was observed. Our results provide strong evidence of the coexistence of interstitial vortices in the islands and fluxoids in the holes.

Key words: matching effect, interstitial vortex

中图分类号:  (Magnetic properties including vortex structures and related phenomena)

  • 74.25.Ha
74.78.Na (Mesoscopic and nanoscale systems)